Communication To Device Through Lighting Control

1. A method comprising: causing a light emitter to transmit an optical signal, wherein transmitting the optical signal comprises transmitting a code by modulating an intensity of illumination provided from the light emitter; causing a display to provide a first image; receiving, from a device exposed to the illumination provided by the light emitter, a wireless transmission produced by the device in response to being exposed to the illumination; and responsive to receiving the wireless transmission and based on contents of the received wireless transmission, causing the display to provide a second image.

2. The method of claim 1 , wherein the first image and second image represent respective advertisements.

3. The method of claim 1 , further comprising: determining that the received wireless transmission was generated based on the code, wherein causing the display to provide a second image is performed responsive to determining that the received wireless transmission was generated based on the code.

4. The method of claim 3 , wherein the wireless transmission received from the device is indicative of user preferences of a user of the device, and wherein causing the display to provide a second image comprises causing the display to provide a second image that is based on the user preferences.

5. The method of claim 3 , wherein determining that the received wireless transmission was generated based on the code comprises determining that the received wireless transmission comprises the code.

6. The method of claim 3 , wherein determining that the received wireless transmission was generated based on the code comprises determining that a timing of transmission of the received wireless transmission is within a specified duration after transmission of the optical signal.

7. The method of claim 6 , wherein receiving, from a device exposed to the illumination provided by the light emitter, a wireless transmission produced by the device in response to being exposed to the illumination is performed by a server that is remote from the display, and wherein causing the display to provide a second image comprises the server transmitting, to the display, an instruction to provide the second image.

8. The method of claim 1 , wherein the wireless transmission received from the device is indicative of user preferences of a user of the device, and wherein causing the display to provide a second image comprises causing the display to provide a second image that is based on the user preferences.

9. The method of claim 1 , wherein the display comprises the light emitter.

10. A system comprising: a transceiver; and a controller that is operably coupled to the transceiver, wherein the controller comprises a computing device programmed to: cause a light emitter to transmit an optical signal, wherein transmitting the optical signal comprises transmitting a code by modulating an intensity of illumination provided from the light emitter; cause a display to provide a first image; use the transceiver to receive, from a device exposed to the illumination provided by the light emitter, a wireless transmission produced by the device in response to being exposed to the illumination; and responsive to receiving the wireless transmission and based on contents of the received wireless transmission, cause the display to provide a second image.

11. The system of claim 10 , wherein the first image and second image represent respective advertisements.

12. The system of claim 10 , wherein the computing device is further programmed to: determine that the received wireless transmission was generated based on the code, wherein causing the display to provide a second image is performed responsive to determining that the received wireless transmission was generated based on the code.

13. The system of claim 12 , wherein the wireless transmission received from the device is indicative of user preferences of a user of the device, and wherein causing the display to provide a second image comprises causing the display to provide a second image that is based on the user preferences.

14. The system of claim 12 , wherein determining that the received wireless transmission was generated based on the code comprises determining that the received wireless transmission comprises the code.

15. The system of claim 12 , wherein determining that the received wireless transmission was generated based on the code comprises determining that a timing of transmission of the received wireless transmission is within a specified duration after transmission of the optical signal.

16. The system of claim 15 , wherein the transceiver is remote from the display, and wherein causing the display to provide a second image comprises using the transceiver to transmit, to the display, an instruction to provide the second image.

17. The system of claim 10 , wherein the wireless transmission received from the device is indicative of user preferences of a user of the device, and wherein causing the display to provide a second image comprises causing the display to provide a second image that is based on the user preferences.

18. The system of claim 10 , wherein the system comprises the display and the light emitter, and wherein the display comprises the light emitter.

19. A method comprising: causing a light emitter to transmit an optical signal, wherein transmitting the optical signal comprises transmitting a code by modulating an intensity of illumination provided by the light emitter, wherein the code is indicative of a cryptographic key; receiving a wireless transmission from a device exposed to the illumination provided by the light emitter; using the cryptographic key to decode at least a portion of the received wireless transmission; and transmitting, to the device exposed to the illumination, information encrypted using the cryptographic key; causing the light emitter to transmit a second optical signal, wherein transmitting the second optical signal comprises transmitting a second code by modulating an intensity of illumination provided by the light emitter, wherein the second code is indicative of a second cryptographic key; receiving a second wireless transmission from the device exposed to the illumination provided by the light emitter; using the second cryptographic key to decode at least a portion of the received second wireless transmission; and transmitting, to the device exposed to the illumination, information encrypted using the second cryptographic key.